Types of Chemical Reactions, Balancing and Molar Mass Test

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What is a synthesis reaction?

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A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product. Example: 2H₂ + O₂ → 2H₂O.

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What is a double displacement reaction?

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A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: 2NaBr + Ca(OH)₂ → CaBr₂ + 2NaOH.

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How do you calculate molar mass?

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To calculate molar mass, sum the atomic masses of all atoms in a molecule. Example: For (NH₄)₂S, calculate (2×14.01) + (8×1.01) + (32.07) = 68.17 g/mol.

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What is the molar mass of Li₂O?

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The molar mass of Li₂O is calculated as follows: (2×6.94) + (16.00) = 29.88 g/mol.

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What is a balanced chemical equation?

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A balanced chemical equation has the same number of each type of atom on both sides of the equation, following the law of conservation of mass.

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What is a decomposition reaction?

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A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products. Example: 2H₂O → 2H₂ + O₂.

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What is a single displacement reaction?

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A single displacement reaction is a type of chemical reaction where one element replaces another in a compound. Example: Zn + 2HCl → ZnCl₂ + H₂.

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What is the significance of balancing chemical equations?

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Balancing chemical equations is important because it ensures that the law of conservation of mass is obeyed, meaning matter is neither created nor destroyed in a chemical reaction.

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What is the molar mass of NH₄?

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The molar mass of NH₄ (ammonium) is calculated as: 14.01 (N) + 4×1.01 (H) = 18.05 g/mol.

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What is the formula for calculating the molar mass of a compound?

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The formula for calculating molar mass is: Molar Mass = Σ (number of atoms × atomic mass of each element).